A077729 Smallest square beginning with n copies of n.

1, 225, 3330625, 44448889, 55555432804, 6666662032144, 77777777127241, 8888888859057216, 99999999989350756, 101010101010101010103146096508501770025, 1111111111111111111111185920458269940592889, 121212121212121212121212460158453802091945103889

Offset: 1

Author

Amarnath Murthy, Nov 19 2002

Keywords

• base
• nonn

Comments

From a(1) up to a(12), except for n = 7, these smallest squares begin with exactly n copies of n, but a(7) begins with 8 copies of 7. What is the smallest square beginning with exactly 7 copies of 7? - Bernard Schott, Jan 29 2022

27888667^2 = 777777747036889 begins with exactly 7 copies of 7. - Michel Marcus, Jan 30 2022

Crossrefs

Cf. A077730.

Extensions

Corrected and extended by Sascha Kurz, Jan 04 2003

a(11)-a(12) from Bernard Schott, Jan 29 2022